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Classifications

B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES

B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES

B04C5/00—Apparatus in which the axial direction of the vortex is reversed

B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits

B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow

B—PERFORMING OPERATIONS; TRANSPORTING

B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES

B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES

B04C5/00—Apparatus in which the axial direction of the vortex is reversed

B04C5/08—Vortex chamber constructions

B04C5/081—Shapes or dimensions

D—TEXTILES; PAPER

D21—PAPER-MAKING; PRODUCTION OF CELLULOSE

D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE

D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor

D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force

D21D5/24—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in cyclones